Github user mxm commented on the pull request:
https://github.com/apache/flink/pull/571#issuecomment-90475934
Is the Hadoop configuration specified in the flink-conf.yaml loaded? If we
set `mapred.output.dir` then we should check for an existing config entry
beforehand. Otherwise, we overwrite Hadoop configuration values. Like @fhueske
suggested, please open a JIRA for investigation.
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